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#include "zexy.h"
#ifdef __SSE__
#include <xmmintrin.h>
#define Z_SIMD_BLOCK 16 /* must be a power of 2 */
#define Z_SIMD_BYTEALIGN (128/8) /* assume 128 bits */
#define Z_SIMD_CHKBLOCKSIZE(n) (!(n&(Z_SIMD_BLOCK-1)))
#define Z_SIMD_CHKALIGN(ptr) ( ((unsigned long)(ptr) & (Z_SIMD_BYTEALIGN-1)) == 0 )
typedef union {
__m128 vec;
t_sample f[4];
} t_sample4;
/**
* runs a check whether the SSE-optimized perform routine returns the same result as the generic routine
* if the results differ, the SSE-code is probably broken, so we should fallback to the generic code
*/
static int zexy_testSSE(t_perfroutine genericperf, t_perfroutine sseperf, unsigned int numinchannels, unsigned int numoutchannels)
{
/* this currently only works with single input, single output */
/* LATER make it work truely multichannel */
if(1==numinchannels && 1==numoutchannels) {
t_int w1[4], w2[4];
t_sample4 in, in1[4], in2[4], out1[4], out2[4];
int i, j;
z_verbose(2, "checking for SSE compatibility");
in.f[0]=0.;
in.f[1]=-0.5;
in.f[2]=0.5;
in.f[1]=5.;
for(i=0; i<4; i++) {
in1[i].f[0]=in.f[i]; in1[i].f[1]=in.f[i]; in1[i].f[3]=in.f[i]; in1[i].f[2]=in.f[i];
out1[i].f[0]=out1[i].f[1]=out1[i].f[2]=out1[i].f[3]=0.f;
in2[i].f[0]=in.f[i]; in2[i].f[1]=in.f[i]; in2[i].f[3]=in.f[i]; in2[i].f[2]=in.f[i];
out2[i].f[0]=out2[i].f[1]=out2[i].f[2]=out2[i].f[3]=0.f;
}
w1[0]=(t_int)0; w1[1]=(t_int)&in1; w1[2]=(t_int)&out1; w1[3]=(t_int)16; (*genericperf)(w1);
w2[0]=(t_int)0; w2[1]=(t_int)&in2; w2[2]=(t_int)&out2; w2[3]=(t_int)16; (*sseperf)(w2);
for(i=0; i<4; i++) {
for(j=0; j<4; j++) {
if(fabsf(out1[i].f[j]-out2[i].f[j])>1e-17) {
z_verbose(2, "generic and optimized routines return different results: skipping optimization");
z_verbose(2, "[%d,%d]: ((%f->%f)!=(%f->%f))",
i, j,
in1[i].f[j], out1[i].f[j],
in2[i].f[j], out2[i].f[j]
);
return 0;
}
}
}
} else {
/* no tests yet */
}
z_verbose(2, "using SSE optimization");
return 1;
}
#endif /* __SSE__ */
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